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svp [43]
3 years ago
15

How many bananas are equal to 7.50 moles of bananas?​

Chemistry
1 answer:
Veseljchak [2.6K]3 years ago
7 0

Answer:

4.52×10^24

Explanation:

N = n × Na

where; N = no. of bananas

n = no. of moles

Na = Avogadro's constant

Which is 6.02×10^23

N = 7.5 × 6.02×10^23

N =4.515×10^24

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How many parts per million of fluoride in a solution that is 500 grams of fluoride and 500,000 liters water
erik [133]

0.000001‬ppm

Explanation:

Mass of fluoride = 500g

Volume of water = 500000liters

Unknown:

Parts per million of fluoride = ?

Solution:

The parts per million is the amount of solute in milligram dissolved in a liter of water or milligram per kilogram of solvent

It is a unit used to express very small concentration.

 we need to convert g - mg

   500g = 500 x  10⁻³mg  = 0.5mg

   Concentration in parts per million = \frac{mass in mg}{Volume in liters}

Concentration in parts per million = \frac{0.5}{500000} = 0.000001‬ppm

learn more:

Parts per million brainly.com/question/2854033

#learnwithBrainly

7 0
3 years ago
Convert 72g of O2 to moles
Volgvan
Moles = mass / molar mass
molar mass of O2 is 32
therefore moles = 72/32
= 2.25 moles
4 0
3 years ago
Read 2 more answers
The volume of a gas at 2.0 atm is 3.0 L. What is the volume of the gas at 1.5 atm at the same temperature?
pshichka [43]

Answer:

4 L

Explanation:

Ideal gas law is P1V1T2=P2V2T1

V2=P1V1/P2

T is not necessary to add since it is constant.

6 0
3 years ago
Which state is true about the speed of heat transfer by conduction?
Thepotemich [5.8K]
I think the answer is, Thermal? I hope u get it right
3 0
3 years ago
What is the mass percentage of oxygen in Ba3(PO4)2? Please help how do I go about figuring this out?
Mice21 [21]

Molecular Mass of Compound.

\\ \sf\longmapsto Ba_3(PO_4)_2

\\ \sf\longmapsto 3(137u)+2(39u+4(16u))

\\ \sf\longmapsto 411u+2(39u+64u)

\\ \sf\longmapsto 411u+2(103u)

\\ \sf\longmapsto 411u+206u

\\ \sf\longmapsto 617u

  • Molecular mass of O in compound=16(4)=64u

\\ \sf\longmapsto Mass\%\:of\:O

\\ \sf\longmapsto \dfrac{64}{617}\times 100

\\ \sf\longmapsto \dfrac{6400}{617}

\\ \sf\longmapsto 10.3\%

6 0
3 years ago
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